You also need to understand a bit of Japan. Ikebukuro is the womens/girls Akiba. So it's really normal to see the oppoiste of Akiba there. There are countless cafes there that cater to females, where in Akiba it is male.

And akiba is short for akihabara.

The underwear vending machine are out, and hidden now, mostly Akiba from what I hear on whispers, not in public. Maybe even one in Nakano broaddway...

And Kissa's in general are in decline, not just no pantsu kissas.